He does not stand upon decency . . . but will talk smut, though a
priest and his mother be in the room.
Addison.
Smut mill, a machine for cleansing grain from smut.
Smut (?), v. t. [imp. & p. p. Smutted; p. pr. & vb. n. Smutting.] 1. To
stain or mark with smut; to blacken with coal, soot, or other dirty
substance.